ispc fails to compile on systemss with modern clang/llvm

[Branko Badrljica]

I tired compiling ispc-1.9.2/1.10.0/9999.

I have gcc -7.40 and 8.3.0  and llvm/clang 7.0.1 and 8.0.0.

Whatever I tried, comiilation always fails at the same point:

echo Creating ispc executable
Creating ispc executable
x86_64-pc-linux-gnu-g++ -march=native -O3 -pipe -Wl,-O1 -Wl,--as-needed -o ispc objs/ast.o objs/builtins.o objs/cbackend.o objs/ctx.o objs/decl.o objs/expr.o objs/func.o objs/ispc.o objs/llvmutil.o objs/main.o objs/module.o objs/opt.o objs/stmt.o objs/sym.o objs/type.o objs/util.o objs/builtins-dispatch.o objs/builtins-target-avx2-i64x4-32bit.o objs/builtins-target-avx11-i64x4-32bit.o objs/builtins-target-avx1-i64x4-32bit.o objs/builtins-target-avx1-32bit.o objs/builtins-target-avx1-x2-32bit.o objs/builtins-target-avx11-32bit.o objs/builtins-target-avx11-x2-32bit.o objs/builtins-target-avx2-32bit.o objs/builtins-target-avx2-x2-32bit.o objs/builtins-target-sse2-32bit.o objs/builtins-target-sse2-x2-32bit.o objs/builtins-target-sse4-8-32bit.o objs/builtins-target-sse4-16-32bit.o objs/builtins-target-sse4-32bit.o objs/builtins-target-sse4-x2-32bit.o objs/builtins-target-generic-4-32bit.o objs/builtins-target-generic-8-32bit.o objs/builtins-target-generic-16-32bit.o objs/builtins-target-generic-32-32bit.o objs/builtins-target-generic-64-32bit.o objs/builtins-target-generic-1-32bit.o objs/builtins-target-knl-32bit.o objs/builtins-target-skx-32bit.o objs/builtins-target-avx2-i64x4-64bit.o objs/builtins-target-avx11-i64x4-64bit.o objs/builtins-target-avx1-i64x4-64bit.o objs/builtins-target-avx1-64bit.o objs/builtins-target-avx1-x2-64bit.o objs/builtins-target-avx11-64bit.o objs/builtins-target-avx11-x2-64bit.o objs/builtins-target-avx2-64bit.o objs/builtins-target-avx2-x2-64bit.o objs/builtins-target-sse2-64bit.o objs/builtins-target-sse2-x2-64bit.o objs/builtins-target-sse4-8-64bit.o objs/builtins-target-sse4-16-64bit.o objs/builtins-target-sse4-64bit.o objs/builtins-target-sse4-x2-64bit.o objs/builtins-target-generic-4-64bit.o objs/builtins-target-generic-8-64bit.o objs/builtins-target-generic-16-64bit.o objs/builtins-target-generic-32-64bit.o objs/builtins-target-generic-64-64bit.o objs/builtins-target-generic-1-64bit.o objs/builtins-target-knl-64bit.o objs/builtins-target-skx-64bit.o objs/builtins-c-32.o objs/builtins-c-64.o objs/stdlib_mask1_ispc.o objs/stdlib_mask8_ispc.o objs/stdlib_mask16_ispc.o objs/stdlib_mask32_ispc.o objs/stdlib_mask64_ispc.o objs/parse.o objs/lex.o -L/usr/lib64/llvm/8/lib64  -lclangFrontend -lclangDriver -lclangSerialization -lclangParse -lclangSema -lclangAnalysis -lclangAST -lclangBasic -lclangEdit -lclangLex -lLLVMOption -lLLVMipo -lLLVMInstrumentation -lLLVMVectorize -lLLVMLinker -lLLVMIRReader -lLLVMAsmParser -lLLVMX86Disassembler -lLLVMX86AsmParser -lLLVMX86CodeGen -lLLVMGlobalISel -lLLVMSelectionDAG -lLLVMAsmPrinter -lLLVMCodeGen -lLLVMScalarOpts -lLLVMInstCombine -lLLVMAggressiveInstCombine -lLLVMTransformUtils -lLLVMBitWriter -lLLVMX86Desc -lLLVMMCDisassembler -lLLVMX86Info -lLLVMX86AsmPrinter -lLLVMX86Utils -lLLVMMCJIT -lLLVMExecutionEngine -lLLVMTarget -lLLVMAnalysis -lLLVMProfileData -lLLVMRuntimeDyld -lLLVMObject -lLLVMMCParser -lLLVMBitReader -lLLVMMC -lLLVMDebugInfoCodeView -lLLVMDebugInfoMSF -lLLVMCore -lLLVMBinaryFormat -lLLVMSupport -lLLVMDemangle -lpthread -lcurses -lz -ltinfo -ldl
/usr/lib/gcc/x86_64-pc-linux-gnu/8.3.0/../../../../x86_64-pc-linux-gnu/bin/ld: objs/llvmutil.o: in function `lDumpValue(llvm::Value*, std::set<llvm::Value*, std::less<llvm::Value*>, std::allocator<llvm::Value*> >&)':
llvmutil.cpp:(.text+0x3370): undefined reference to `llvm::Value::dump() const'
/usr/lib/gcc/x86_64-pc-linux-gnu/8.3.0/../../../../x86_64-pc-linux-gnu/bin/ld: llvmutil.cpp:(.text+0x3418): undefined reference to `llvm::Value::dump() const'
/usr/lib/gcc/x86_64-pc-linux-gnu/8.3.0/../../../../x86_64-pc-linux-gnu/bin/ld: objs/opt.o: in function `DebugPass::runOnModule(llvm::Module&)':
opt.cpp:(.text+0x432): undefined reference to `llvm::Module::dump() const'
/usr/lib/gcc/x86_64-pc-linux-gnu/8.3.0/../../../../x86_64-pc-linux-gnu/bin/ld: objs/opt.o: in function `IsCompileTimeConstantPass::runOnBasicBlock(llvm::BasicBlock&)':
opt.cpp:(.text+0x15cd): undefined reference to `llvm::Value::dump() const'
/usr/lib/gcc/x86_64-pc-linux-gnu/8.3.0/../../../../x86_64-pc-linux-gnu/bin/ld: opt.cpp:(.text+0x16f4): undefined reference to `llvm::Value::dump() const'
/usr/lib/gcc/x86_64-pc-linux-gnu/8.3.0/../../../../x86_64-pc-linux-gnu/bin/ld: objs/opt.o: in function `ReplaceStdlibShiftPass::runOnBasicBlock(llvm::BasicBlock&)':
opt.cpp:(.text+0x2ac1): undefined reference to `llvm::Value::dump() const'
/usr/lib/gcc/x86_64-pc-linux-gnu/8.3.0/../../../../x86_64-pc-linux-gnu/bin/ld: opt.cpp:(.text+0x2bf6): undefined reference to `llvm::Value::dump() const'
/usr/lib/gcc/x86_64-pc-linux-gnu/8.3.0/../../../../x86_64-pc-linux-gnu/bin/ld: objs/opt.o: in function `InstructionSimplifyPass::runOnBasicBlock(llvm::BasicBlock&)':
opt.cpp:(.text+0x3b5c): undefined reference to `llvm::Value::dump() const'
/usr/lib/gcc/x86_64-pc-linux-gnu/8.3.0/../../../../x86_64-pc-linux-gnu/bin/ld: objs/opt.o:opt.cpp:(.text+0x3ca2): more undefined references to `llvm::Value::dump() const' follow
/usr/lib/gcc/x86_64-pc-linux-gnu/8.3.0/../../../../x86_64-pc-linux-gnu/bin/ld: objs/opt.o: in function `Optimize(llvm::Module*, int)':
opt.cpp:(.text+0x11758): undefined reference to `llvm::Module::dump() const'
/usr/lib/gcc/x86_64-pc-linux-gnu/8.3.0/../../../../x86_64-pc-linux-gnu/bin/ld: opt.cpp:(.text+0x117a7): undefined reference to `llvm::Module::dump() const'
collect2: error: ld returned 1 exit status
make: *** [Makefile:276: ispc] Error 1

[Branko Badrljica]

Errrm, scratch that. All I had to do is to recompile llvm/clang withj debug flag and now ispc compiles fine, at least git version...

[Dmitry Babokin]

It's not exactly debug flag, you need -DLLVM_ENABLE_DUMP=ON when configuring LLVM with CMake. Or build LLVM using our alloy.py script.

Also, it's recommended that LLVM and ISPC are built with the same compiler (either gcc or clang), some gcc/clang versions are known to have ABI incompatibility (fixed in the latest gcc/clang combination).

On Mon, Apr 1, 2019 at 6:54 AM Branko Badrljica <bran...@gmail.com> wrote:

Errrm, scratch that. All I had to do is to recompile llvm/clang withj debug flag and now ispc compiles fine, at least git version...

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